During their first encounter with Tiel Noembreux and her friends, Romefeller's pursuit team is badly damaged. Taken back to base, the two Gundams are upgraded with parts from other mobile suits fielded by OZ. The XXXG-01DG Gundam Deathscythe Guilty is given parts from Valder Farkill's OZ-15AGX Hydra Gundam, including its shoulder claws and its thruster-laden skirt armor, which is attached to the back in similar fashion to wings. Armed with her new machine, Semis returns to the battlefield to chase the three stolen Gundams.